Aqueous dispersions of functional graft polyorganosiloxanes and curable silicone compositions comprised thereof
US5618879A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Mar 25, 1996 |
| Grant date | Apr 8, 1997 |
| Priority date | — |
| Expiry date | Mar 25, 2016 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC09D183/10
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
Stable reactive aqueous dispersions of functional graft polyorganosiloxanes, well suited for formulation into curable silicone compositions useful in the production of release- and other coatings and paints, comprise the polymerizate of at least one ethylenically unsaturated monomer with a functional polyorganosiloxane which comprises identical or different recurring structural units of formula (I): EQU R.sub.a Y.sub.b X.sub.c SiO.sub.(4-a-b-c)/2 (I) in which the radicals R, which may be identical or different, are each a C.sub.1 -C.sub.18 alkyl radical, a C.sub.2 -C.sub.20 alkenyl radical, or a C.sub.6 -C.sub.12 aryl or aralkyl radical, or halogen-substituted such radical; the radicals X, which may be identical or different, are each a hydrogen atom or a reactive functional group bonded to a silicon atom via an Si-C or Si-O-C linkage; the radicals Y, which may be identical or different, are each an ethylenically unsaturated hydrocarbon radical optionally comprising one or more of the heteroelements O and/or N, and bonded to a silicon atom of the structural unit of formula (I) via an Si-C linkage and reactive with said at least one ethylenically unsaturated monomer; a, b and c are …
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.